Collapsible cobs structure



Nov 19, 1929. P. DE MATTIA 1,735,896 COLLAPSIBLE CORE STRUCTURE Filed Jan. 6, 1927 5 Sheets-Shet 1 I IN VENTOR @n XQ; ZZZ/674" BY @MWATTMNEK Nov. 19,1929. 1 P. DE MATTIA COLLAPSIBLE GORE STRUCTURE 5 Sheets-Sheet 3 Filed Jan. 6, 1927 11v VEEOR B Y @5 Dial, M

A TTOR/VE Y -Nov. 19, 1929. P. DE MATTIA COLLAPSIBLE CORE STRUCTURE 5 Sheets- Sheet 4 Filed Jan. 6, 1927 I Nov. 19, 1929. P'. DE MATTIA 1,735,896

COL-LAP S I BLE CORE S TRUC TUBE Filed Jan. 6, 1927 5 Sheets-Sheet 5 INVENTOR 7 A TTORNE KY F atentecl Nov. 1 9 1929 "ET E1 rn'rnnnn MATTIA, on PASSAIG, New JERSEY, ASSIGNG'R, BY 'nsnr, iissreivirnnrs, 'IO NATIONAL RUBBER MACHINERY COMPANY, or AKRON, 01110, A CORPORATION OF OHIO" COLLAPSIBLE CORE STRUCTURE Application filed January 6, 1927. Serial: No. 159,265;

This invention-relates tocollapsible cores, such as. areused in the manufacture of tire casings or shoes-,andmore particularly to cores-which are wider at the base than at the crown or substantially triangular in cross section,

Qne feature of-the invention is directed to the provision ofa collapsible core whose segmental sections may be moved into and out of'the plane-of. operative-continuity by rotatingthecore manually. in relation to its rotary support or driving member. In the preferred embodiment illustrated, the core comprises apaii' of-l oppositely disposed primary or key sections, which are-adapted-to be drawn radiallyinward within the. core plane by the independent rotation of the Whole core structure, as well as apair of oppositely disposed supplemental or secondary sections which, after the withdrawal of the key sections, are adapted-to be pulledforwardly out of the core plane. with the tire thereon and then drawn radially inward in an. oblique direction by their independent rotation in order to dismount the tire In. providing for the col laipsing of. the core in this manner, the key sections: and secondary sections are mounted in, separable hub members which may be read- 4 connected, to and disconnected from the driving member, and which may be as readily brought together or moved apart, as required;

The-key sections are carried by tworack bars slidable radially in guides formed in the cor responding" hubmember and meshing with a pi ionifast to the driving memberbut located within. the hub member. Consequently, when the hiibmember is disconnected from the driving member, the independent rotation of the core will cause the fixed pinion, by its engagement with. the slidabl'e rack bars, todraw the key sections radially inward toward each other asabovestated. During this initial operaition,thetwohuhmembers remain together and turn as one, the secondary sections being held out in their normal positions. However after the key sections have been moved inwardly out of the way, the hub member which carriesthe secondary sections is slid axially in a forward direction onto a special extension rod or spindle attached temporarily tothe driving; member. This, extension spindle,

which of course isv fixed against rotation, is

adapted to interlock with a pinion mounted within the second, hub member whenthelatteris inits forward shifted position, and; said pinion meshes with two obliquely arranged or inclined rack bars slidable in corresponding'guides for-medin the hub member. Hence,

operations are simply reversed and the two hub members looked as. one to the driving member, the extension spindle being detached and placed aside until the coreis to. be collapsed again. WVhen the hub members are connected. to the driving member, the collapsing pinions are idle, all three parts rotating together as a unit.

c In theaccompanying drawings, the invention has beenshown merely in preferred form and by way of example, but obviously many changes. and variations may be made therein and in its mode ofoperation which will still be comprised within its spirit. therefore, be understood that the invention is not limited to any specific form orembodiment except in so far as such limitations, are specified in the claims.

In the drawings 2 Fig. 1 is a front elevation, partly in section. and. partly broken away, of the improved core;

Fig. 2 is vertical transverse section taken on the line 22 of Fig. 1,; showing by the dotted lines the shifted and retracted positions of the core sections;

Fig. 3 is a detail perspective view of the supporting spindle and the extension there,- for;

Fig. 4: is a detail face view of the loose pinion associated with the second hub member;

It should,

Fig. 5 is a transverse section taken on a line passing substantially horizontally and centrally through the core as shown in Fig. 1, and indicating by the dotted lines the shifted and retracted positions of the secondary core sections Figs. 6 and 7 are edge and side views, respectively, of one of the inclined rack bars associated with the secondary core sections;

Fig. 8 is a vertical section taken on the line 88 of Fig. 2, showing in full lines the key sections retracted and in dotted lines the secondary sections retracted;

Fig. 9 is a face view of the second axially movable hub member;

Fig. 10 is a face view, partly broken away, of the core proper as cast and before it is cut into sections; I

Fig. 11 is a -fragmentary view of a portion of the core showing the saw cut through the reinforcing rib;

Fig. 12 is a similar view showing the application of the interlocking plates to the op posed ends of abutting sections;

Figs. 13 and 14 are face views of the interlocking plates as attached to their respective core sections;

Figs. 15 and 16 are detail fragmentary views showing the relationship of the interlocking plates in their engaged and disengaged positions, respectively.

The invention has been illustrated herein in connection with a core of substantially triangular cross section, such a core forming the subject matter of my prior patent, No. 1,631,855 dated June 7, 1927, and in itself constituting no part of the invention. While the present improvements are especially applicable to cores of this type, it should be understood that they are equally applicable to cores of the other types.

As shown in Fig. 1, the core proper com prises a pair of primary or key sections A, A they being the first to be retracted in collapsing the core, and a pair of supplemental or secondary core sections B, B the sections of the respective pairs being diametrically opposed to each other and arranged end to end to form a complete ring or annulus. The key sections A, A are each provided on their opposite ends with toothed plates a adapted to interlock with corresponding plates Z; secured to the secondary sections B, B when both pairs are brought into their normal positions of continuity and thus prevent radial and lateral displacement of the sections relatively to each other. The key sections are also provided with radially disposed rack bars A which are secured by screw bolts a to transverse bridge plates AJ" cast within the key sections, and which extend parallelly in opposite directions through a hub member A wherein they are guided and maintained in constant mesh with a pinion C The latter, as best shown in Fig. 3, is formed on or otherwise secured to a spindle C which is rigidly clamped to a rotary support or driving mem-- ber C. The secondary sections 13,13 are like.- wise provided with rack bars B secured by screw bolts 5 to corresponding bridge plates B but these bars (as indicated in Fig. 5) are inclined or disposed obliquely with reference to the plane of the core and extend through a second hub member B wherein they are guided and maintained in constant mesh with a pinion C This pinion, unlike the pinion C is loosely mounted on the spindle C and retained within the hub B by a ring B the latter being notched at B (Fig. 9) to accommodate the rack bars B 2 The hub member 13* is journaled on the spindle O and is capable of axial movement,

back and forth, upon an extension C so as to transport the said secondary core sections B, B into and out of the operative plane of the core. A pin 0 fastened transversely through the extension C near the free end thereof serves to arrest the hub in its forward shifted position (shown at the right in Fig. 2) and is adapted at such time, for reasons later to appear, to engage in one or another pair of a series of radial notches or grooves 0 formed in the outer side of the pinion C In this connection, it will be noted that the central aperture of the retaining ring B is sufficiently large to clear the pin 0 when the hub member B occupies its forward position. Preferably, the extensionC is detachably connected to the spindle C so that it may be removed, if desired, during the building of a tire on the core. In carryingout this feature, (see Figs. 2 and suitable connecting means are employed which comprise a longitudinal latch rod C countersunk and resiliently mounted in the spindle extension G and a lug C rising from the reduced end portion C thereof adjacent the rear end of said rod. The spindle C as will be observed, is bored outto receive the reduced end portion C of the spindle extension and is formed with a bayonet slot C C wherein the lug C and rod C engage when the extension is applied (Fig. 2). In attaching the extension C it is inserted into the end of the spindle C with the lug C registering with the slot C5, the latter, as will be noted, being just wide enough to accommodate either the lug or the end of the rod C As the extension is pressed home, the rod G by its engagement with the end of the spindle is forced back against the tension of the spring C, and a slight turn is then given to the extension to seat the lug in the pocket C and at the same timepermit the rod C to snap into the slot C The extension is thereby locked against relative rotation and longitudinal displacement to the spindle C When it is desired to remove the extension, the latch rod is manually retracted from the slot G by means of a cross pin 0, which also serves to limit the forward thrust ofsaidrod; and the extension is then turned to disengage the lug C from the pocket G and; drawn forwardly through the slot C The hub member-A like its associate mem- ,.ber B is also ournaled' on the spindle C but is held: against endwise movement thereon by its. engagement at one end with the driving member .0 and at its opposite end with a collar formed on the spindle. Normally, the hub member A is connected with the driving member G and rotary motion is thus imparted to. the core through the rack bars However, provision is made for breaking said driving. connection when desired to permit: the manual rotation of the core rela- "tively, to the driving member and the spindle and by, such manual rotation to move the key sections inwardly from their operative positionof continuity, it being understood, of course, that after the key sections A, A are thus withdrawn, the secondary sections. B, B may. be shifted forwardly out of the core planeand onto the spindle extension so as to be collapsed in a similar manner. Accord- ,ingly and in the present instance (see Fig. 2-), the driving member G is provided with a retractible clutch pin C having a tapered end G which normally engages Within a corresponding aperture formed in the hub memher At. A spring C seated in a recess behindthe tapered .endC and banking against a plugv-C screwed into'the driving member, tendsto holdthe pin resiliently in its engaging position. the pin will be accomplished by means of a handle C projecting laterally therefrom through a slot C in the driving member, but in the event of binding, an auxiliary pin C mounted in the hub member A may be utiture is disengaged from the driving member C and the, rigidly. detached spindle G and is free to be rotated relatively thereto. By turning the .eoreand the tire built thereon about the spindle G in aclockwise direction (Fig. 1), the rack bars A through their engagement with the fixed pinion C are then caused to moveinwardly relatively to eachother in.

opposite directions to-withdraw the. key sections A, A from their respective positions of continuity within the tire, the toothed plates, a passing out of engagementwith the toothed'plates 6 carried bythe secondary secto arenext pulled forwardly by handout ofthe opera-tiveplane ofrthecore to the dotted line Ordinarily, the retraction of lized to force it out. The slot C has an ofliset,

tionS;B, B and leaving the? latter free for axial movement onthe. spindle C The secondary sections B, B with the tire thereon.

position-indicatedby. the letterX inFig. 5,

the hub B and the contained pinion C slidingi along the spindle extension 0* (which has previously been attached to the spindle G in themanner before described) until arrestedi by the engagement of the pinion with the transverse pin 0 at its forward end. The pin 0 enters one or another of the several pairsof radial: grooves 0 formed in the pinion C and looks it against rotation on the spindle extension. The secondary sections B, Bi'withthe tirethereon are now turned in the reverse direction as permitted by the loose mounting of'the hub member B upon thespindle extension C causing the rack bars B through their engagement with the fixed pinion C to draw the core sections inwardly to the dotted line position indicated by the letter Y in Figs. 5 and 8. Owing to the inclinationof the rack bars B they will project forwardly and outwardly clear oi the secondary sections and allow the latter to approach each other close enough to enable thetire to be removed therefrom with little or. no distortion. In restoring the parts to their normal operative relation, the above operations are simply reversed, the spindle extension C being detached after the secondary sections have been pushed back onto the main spindleC In order to limit the outward movement of the key sections, the rack bars A are each provided at their inner ends with stop screws a (see Fig. 1) which engage opposite sides of the hub member A. Similar stop screws may be applied to the rack bars B of the secondary sections B,- B although the interlocking engagement of the toothed plates a and 7), in conjunction with the inclination of the rack bars, will overcome any tendency of the sections to'move toward or away from the axis of rotation.

Attention is now directed to Figs. 10 to 16 inclusive. It is proposed to cast the core proper as an integral piece and with a series of transverse reinforcing ribs A and then to saw the core into the sections desired, the saw cuts being made through said ribs as indicated bythe broken lines 0a-w in Fig. 10. This simple method of producing a sectional core is much more economical and insures a greater degree of perfection than would be the case if the core sections were cast individually from separate patterns. Moreover, the interlocking plates a and b, if made to correspond in thickness to the width of the saw cuts, will absolutely preserve the original annularity of the core when the sections thereof are matched up. 7

Having thus described my invention, its construction, and mode of operation, what I claim and desire to secure by Letters Patent of the-United States is as follows:

1. A collapsible core structure comprising a plurality of segmental core sections, a rotarysupport, disen 'ageableconnections between the core and the support to permit the rotation of the core relatively to the support, and m us actuated by such relative rotation of the core for moving certain of the sections into and out of the position of operative continuity.

2. A cllapsible core structure comprising a plura oi segmental core sections including a key sections, a rotary suppor means r onnecting the core from the support t nit the relative rotation of the core, in ans actuated by such relative rotation of the core for moving the key sections into and out or the position of operative continuity, and means whereby the remaining core sec -ions may be shifted axially into and out of the o" erative plane or the core.

collapsible core structure comprising a plurality of segmental core sections including p, key sections, a rotary support, means for disconnecting the core from the suppor n it the relative rotation of the core, means ac uated by such relative rotation of the core tor moving the key sections into and out of the position of operative contimeans whereby the remaining core secmay be shirted axially into and out of the operative pl e of the core, and means for moving the lattr ections into and out of their normal relative positions when located out of the core plane.

4;. A collapsible core structure comprising a plurality of segmental core sections arranged in pairs, the sec-tons of the respective pair. being diametrically opposed to each other, a rotary support, means for disconnect ing the core from the support to permit the relative rotation oil-the core, means actuated bysuc .1 relative rotation of the core for moving the sections of one pair within the plane core, and means for moving the latter sections when located out of the core plane into and out of their normal relative positions.

5w A collapsible core structure comprising a pair of key core sections and a pair of secondary core sections, a rotary support having a spindle secured thereto, means tor moving the key sections radially within the operative plane oi the core out of the position of operative continuity, means whereby the sec- ;ondary sections may be shifted axially out of the core plane along the spindle, and means for collapsi the secondary sections in their shifted position, said. collapsing neans being operable by the rotation of the secondary secjtions relatively to the rotary support and spindle.

67 A collapsible core structure comp-rising a pair of key core sections and a pair of secondary core sections, a rotary support, means for disconnecting the core from the support means actuated by such relative rotation of the core for collapsing the key sections, and

means whereby the secondary sections and the collapsed key sections may be shifted axially, one pair relatively to the other, to permit the collapse of the. secondary sections.

7. A collapsible core structure comprising a key core section and plurality of secondary core sections, a rotary support, means for disconnecting the core from the support to per mit the relative rotation of the core, means actuated by such relative rotation of the core for moving the key section into and out of the position or operative continuity, means whereby the secondary sections may be shifted axially .out of the operative plane of the core, and means actuated by the rotation of the 'fted core sections relatively to the support for moving them into and'out of their normal relative positions.

8. A collapsible core structure comprising a plurality of segmental core sections, a rot v support, means for disconnecting the or item the support to permit the relative rotation of the core, a spindle fastened to the support, two hub members mounted on the spindle and wherein the core sections are sup ported, one of said hub members being movable axially away from the other to carry certain core sections out of the operative plane oi? the core, and means associated with the respective hub members and actuated by the relative rotation of the core for moving the corresponding sections into and out of their normal. relative positions.

9. A collapsible core structure comprising a plurality. of segmental core sections includin one or more'key sections, a rotary support, hub member normally engaged therewith, disengageable connections between the hub member and the support to permit the rotation of the core relatively to the support, and means actuated by suchrelative rotation of the core to move the key section or ative continuity.

10. A collapsible core structure comprising a plurality of segmental core sections including one or more key sections, a rotary sup port, a hub member normally engaged therewith but capable of being disengaged therefrom to permit the rotation ot the core relatively to the support, and means actuated by such relative rotation of the core to move the key section or sections into and out of the position of operative continuity, said means comprising a pinion locked against rotation to the support, and a radially movable rack bar secured to each key section and slidably mounted in the hub member in constant mesh with said pinion.

11. A collapsible core structure comprising a pair of key core sections and a plurality of secondary core sections, means for moving the ber loosely mounted on t-he'spindle and slidable'axially thereon to transport the secondary sections'out ofthe'operativeplane of the core,va loose pinion carried by the'hub mem her andmeshingwith said'rack bars, and means for locking the pinion to the spindle inthetransported position ofthe secondary sections, whereby the rotation of the secondary sections relatively to the spindle willcause them to be moved into outof their normal relative POSitiOIlSz- 12. A collapsible core structure comprising a plurality of'seomental core sections, includ ing one or more key sections, a rotary support, a clutch pin for locking the core to the support but capable of being withdrawn to permit the relative rotation of the core, means actuated by such relative rotation of the core to move the key section or sections into and out of the position of operative continuity, and interlocking means between adjacent set-tions for maintaining them in their respective positions .of operative continuity.

13. A collapsible core structure comprising a plurality of segmental core sections including one or more key sections, arotarysupport, means for disconnecting the corefrom the support to permit'the rotation of the core relatively to the support, means actuated by such relativerotation of the corein one direction to move the key section orsections out of the position of operative continuity, means whereby the remaining sections may be shifted axially out of the operative plane of the core, and means actuated by the rela tive rotation of the core in the opposite direction to move the shifted core sections out of their normal relative positions.

14. A collapsible core structure comprising a plurality of segmental core sectionsprovided withrack bars, a rotary support having a spindle secured thereto, a pinion fast to the spindle, a hub member loosely mounted on the spindle and wherein the rack bars of certain'core sections are maintained in mesh with said pinion, means for connecting and dis connecting said hub member to and from the support, a second hub 'member movable axiallyon the spindle and wherein the rack bars of the other core sections are guided, a loose pinion meshing with the latter rack bars, and movable with said second hub member, and means for locking the loose pinion to the spindle in the shifted position of the second hub member.

15. A collapsible core structure comprising a plurality ofsegmental core sections a centrally disposed spindle whereon the sections are supported, an extension detachably secured tothe spindle, means wherebycertain 'of said core sections may be shifted axially out ofthe operative plane of the core onto said extension, and means for'moving. the shifted core sections into and out of their normal relative positions. l.

16. A collapsible core structure comprising a plurality of segmental core sections, a centrally disposed spindle whereon the sections are supported, an extension detachably secured to the spindle, means whereby certain of said core sections may be shifted axially out of the operative plane of the core onto said extension,'a pinionloosely mounted on the spindle and movable with the shiftedcore sections, and an arrestingpinfastened transversely to the outer end of the extension and arranged to engage radial grooves formed in the pinion tolock the latter against rotation thereon, for the purpose described:

17. A collapsible core structure comprisinga plurality'of segmentalcore sections, centrally disposed spindle whereon the sections are supported, an extension for said spindle, a hand-controlled latch key for'lock ing the extension to the spindle, and means whereby certain of said core sections maybe shifted axially out of the operative planeof, the core onto said extension.

18'. A collapsible core structure compris ing a plurality of segmental core sections, a

rotary support with which the core is normally and operatively connected, and a clutch pin retractible at will to disconnect the core from the support, for thepurpose described.-

19. A collapsible corestructure comprising a plurality of segmental core sections divided into groups, means for first-collapsing the sections of one group,means whereby the sections of a different group may subsequently be shifted axially out-of the core plane, andmeans for collapsing thelatter sections when intheir shiftedposition: V

20. A- collapsible core-structure comprising'a plurality of'segmental core sections di vided into groups, means-for first collapsing the sections of'one group inthe operative plane of the'core,means wherebythe sections of adifferent group may subsequently be shifted without collapsing out of the core plane, andmeans for collapsing the latter sece tions while'located out of the core plane.

21. A collapsible core structure compris ing a'pair of key core sections and apair of secondary core sections, interlocking means for holding the sections together-inthe position of operative continuity, means for first drawing the key sections inwardly towardeachother to disengage the interlocking means 'and'to positionthem out of the way of the secondary sections, means whereby the secondary sections may then be moved axially outof'the operative plane oflthe core clear of thekey sections, and means for subsequently drawing the secondary sections inwardly toward each-otherto complete the collapsingiofthe core.

i 22. A collapsible core structure comprising a pair of key core sections and a pair of secondary core'sections, interlocking means for holding the sections together in the position of operative continuity, means for first drawing the key sections inwardly toward each other within the plane of the core to disengage the interlocking means and to position them out of the way of the secondary sections, means whereby the secondary sections may then be moved axially out of the core plane clear of the key sections, and means for subsequently drawing the secondary sections inwardly toward each other in a diagonal direction to complete the collapsing of the core.

g 23. A collapsible core structure comprising a plurality of segmental core sections divided into groups, means for first collapsing 2d the sections of one group without collapsing the sections of adifi'erent group,1neans whereby the several groups may then be shifted axially, one relative to another to locate the sections of the uncollapsed group out of the operative plane of the core, and means for collapsing the sections of the latter group.

24. A collapsible core structure compris ing a pair of key core sections and a pair of secondary core sections, interlocking means formed on the adjacent ends of the key and secondary sections, a rotary supporting spindle, two hub members normally rotatable with the spindle but capable of an independent rotation thereon, rack bars slidably mounted in each hub member and connected to the core sections of the corresponding group, an actuating pinion associated with each hub member and fast to the spindle during the independent rotation of said hub member, the two hub members being rotatable as one upon the spindle to effect the collapsing of the key sections without collapsing the secondary sections, and the hub member for the secondary sections being rotatable alone upon the spindle to etlect the collapsing of the secondary sections.

25. A collapsible core structure comprising a pair of key core sections and a pair of secondary core sections, interlocking means formed on the adjacent ends of the key and secondary sections, a rotary supporting spindle, two hub members normally rotatable with the spindle but capable of an inclependent rotation thereon, rack bars slidably mounted in each hub member and connected to the core sections of the corresponding group, an actuating pinion associated with each hub member and fast to the spindle during the independent rotation of said hub member, the two hub members being rotatableas one upon the spindle to effect the collapsing of the key sections without collapsing the secondary sections, and the hub member for the secondary sections being movable axially on the spindle away from the other hub member to locate said sections out,

of the operative plane of the core, and then rotatable alone on the spindle to effect the collapsing of said sections.

26. A collapsible core structure comprising a pair of key core sections and a pair of secondary core sections, a rotatable supporting spindle, an extension detachably connected to the spindle, means for c'ollapsing the key sections, and means whereby the secondary sections may then be shifted out of the core plane and drawn together in collapsed condition, the said means including a hub member carrying the secondary sections and slidable ofi the supporting spindle onto the extension, a pinion slidable with the hub member and arranged in the shifted position of parts to be locked against rotation to the spindle extension, and a pair or" obliquely arranged rack bars connected to the secondary sections and slida-bly mounted in the hub member in mesh with the rack pinion.

27. A collapsible core structure comprising a plurality of core sections oi substantially triangular cross section and adapted to abut in the form of an annulus, a spindle whereon the core is independently rotatable, and collapsing means operatively connected respectively with the core sections and with the spindle and actuated by such independent rotation of the core to eilcct its collapse.

In testimony whereof, I have ah'ixed my" signature hereto.

PETER nr Marrra. 

